Journal
PHYSICAL REVIEW LETTERS
Volume 107, Issue 14, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.146801
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Funding
- MEXT
- Harvard University
- World-Leading Innovative R&D on Science and Technology (FIRST)
- JSPS
- CIFAR
- [19104007]
- [18340081]
- Grants-in-Aid for Scientific Research [21102003, 19104007] Funding Source: KAKEN
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A crucial requirement for quantum-information processing is the realization of multiple-qubit quantum gates. Here, we demonstrate an electron spin-based all-electrical two-qubit gate consisting of single-spin rotations and interdot spin exchange in a double quantum dot. A partially entangled output state is obtained by the application of the two-qubit gate to an initial, uncorrelated state. We find that the degree of entanglement is controllable by the exchange operation time. The approach represents a key step towards the realization of universal multiple-qubit gates.
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